:root{--font-primary:"Inter",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;--bg-main:#f8fafc;--bg-surface:#fff;--bg-surface-elevated:#fff;--bg-glass:hsla(0,0%,100%,.9);--primary:#0f3b7a;--primary-hover:#0a2540;--primary-light:#eff6ff;--primary-glow:rgba(15,59,122,.25);--accent:#10b981;--accent-hover:#059669;--accent-light:#ecfdf5;--text-main:#0f172a;--text-muted:#475569;--text-light:#94a3b8;--border-color:#e2e8f0;--border-focus:#0f3b7a;--card-shadow:0 10px 25px -5px rgba(0,0,0,.05),0 8px 10px -6px rgba(0,0,0,.03);--card-shadow-hover:0 20px 30px -10px rgba(15,59,122,.12);--badge-green-bg:#d1fae5;--badge-green-text:#065f46;--badge-gold-bg:#fef3c7;--badge-gold-text:#92400e;--badge-blue-bg:#e0f2fe;--badge-blue-text:#075985;--radius-sm:8px;--radius-md:12px;--radius-lg:20px;--radius-full:9999px;--transition:all 0.25s cubic-bezier(0.4,0,0.2,1)}[data-theme=dark]{--bg-main:#0b1320;--bg-surface:#131f33;--bg-surface-elevated:#1a2942;--bg-glass:rgba(19,31,51,.85);--primary:#3b82f6;--primary-hover:#2563eb;--primary-light:rgba(59,130,246,.15);--primary-glow:rgba(59,130,246,.35);--accent:#10b981;--accent-light:rgba(16,185,129,.12);--text-main:#f1f5f9;--text-muted:#cbd5e1;--text-light:#64748b;--border-color:#24344d;--border-focus:#3b82f6;--card-shadow:0 10px 30px rgba(0,0,0,.35);--card-shadow-hover:0 20px 35px rgba(59,130,246,.2);--badge-green-bg:rgba(16,185,129,.2);--badge-green-text:#34d399;--badge-gold-bg:rgba(251,191,36,.2);--badge-gold-text:#fcd34d;--badge-blue-bg:rgba(56,189,248,.2);--badge-blue-text:#38bdf8}*,:after,:before{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:var(--font-primary);background-color:var(--bg-main);color:var(--text-main);line-height:1.6;min-height:100vh;display:flex;flex-direction:column;transition:background-color .3s ease,color .3s ease}a{color:var(--primary);text-decoration:none;transition:var(--transition)}a:hover{color:var(--primary-hover);text-decoration:underline}ol,ul{list-style:none}img,svg{max-width:100%;height:auto;display:block}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 1.25rem}.text-center{text-align:center}.text-accent{color:var(--accent)}.text-primary{color:var(--primary)}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mt-4{margin-top:2rem}.mb-2{margin-bottom:1rem}.mb-4{margin-bottom:2rem}.breadcrumb{margin-bottom:1rem}.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;font-size:.875rem;color:var(--text-muted)}.breadcrumb-list li:not(:last-child):after{content:"›";margin-left:.5rem;color:var(--text-light)}.breadcrumb-list a{color:var(--text-muted)}.breadcrumb-list a:hover{color:var(--primary)}.breadcrumb-list [aria-current=page]{color:var(--primary);font-weight:600}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:1000;background-color:var(--bg-glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color);transition:var(--transition)}.header-inner{justify-content:space-between;height:72px}.header-inner,.logo{display:flex;align-items:center}.logo{gap:.75rem;font-weight:800;font-size:1.35rem;color:var(--text-main);text-decoration:none!important}.logo-badge{width:42px;height:42px;background:linear-gradient(135deg,var(--primary),#0284c7);color:#fff;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-weight:900;box-shadow:0 4px 12px var(--primary-glow)}.logo-text span{color:var(--primary)}.main-nav{gap:1.75rem}.main-nav,.nav-list{display:flex;align-items:center}.nav-list{gap:1.5rem}.nav-link{font-weight:500;font-size:.95rem;color:var(--text-main);padding:.5rem .25rem;position:relative;text-decoration:none!important}.nav-link:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2.5px;background-color:var(--primary);border-radius:2px;transition:var(--transition)}.nav-link.active,.nav-link:hover{color:var(--primary)}.nav-link.active:after,.nav-link:hover:after{width:100%}.header-actions{display:flex;align-items:center;gap:.75rem}.theme-toggle-btn{background:var(--bg-surface);border:1px solid var(--border-color);color:var(--text-main);width:40px;height:40px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--transition);font-size:1.2rem}.theme-toggle-btn:hover{border-color:var(--primary);color:var(--primary);transform:rotate(15deg)}.mobile-toggle-btn{display:none;background:none;border:none;color:var(--text-main);font-size:1.5rem;cursor:pointer;padding:.5rem}.hero{padding:3rem 0 2.5rem;background:radial-gradient(circle at 50% 0,var(--primary-light) 0,transparent 60%)}.hero-grid{display:grid;grid-template-columns:1fr;grid-gap:2.5rem;gap:2.5rem;align-items:center}@media (min-width:992px){.hero-grid{grid-template-columns:1.1fr .9fr}}.hero-heading{font-size:2.3rem;font-weight:800;line-height:1.25;margin-bottom:1rem;color:var(--text-main);letter-spacing:-.02em}@media (min-width:768px){.hero-heading{font-size:2.85rem}}.hero-heading span{background:linear-gradient(135deg,var(--primary),#0284c7);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.hero-subtitle{font-size:1.1rem;color:var(--text-muted);margin-bottom:1.75rem;max-width:650px}.trust-badges{display:flex;flex-wrap:wrap;gap:1.25rem;margin-top:1.5rem}.trust-item{display:flex;align-items:center;gap:.5rem;font-size:.875rem;font-weight:600;color:var(--text-muted);background:var(--bg-surface);padding:.4rem .85rem;border-radius:var(--radius-full);border:1px solid var(--border-color)}.trust-icon{color:var(--primary);font-weight:700}.tool-card{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:2rem;box-shadow:var(--card-shadow);position:relative;overflow:hidden;transition:var(--transition)}.tool-card:before{content:"";position:absolute;top:0;left:0;width:100%;height:5px;background:linear-gradient(90deg,var(--primary),var(--accent),#0284c7)}.tool-card:hover{box-shadow:var(--card-shadow-hover)}.tool-card-header{margin-bottom:1.5rem}.tool-card-title{font-size:1.4rem;font-weight:700;color:var(--text-main);display:flex;align-items:center;gap:.5rem}.tool-card-desc{font-size:.9rem;color:var(--text-muted);margin-top:.25rem}.input-tabs{display:flex;background:var(--bg-main);padding:4px;border-radius:var(--radius-md);margin-bottom:1.25rem;border:1px solid var(--border-color)}.tab-btn{flex:1 1;padding:.6rem .75rem;font-size:.875rem;font-weight:600;border:none;background:transparent;color:var(--text-muted);border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;gap:.4rem}.tab-btn.active{background:var(--bg-surface);color:var(--primary);box-shadow:0 2px 6px rgba(0,0,0,.08)}.form-group{margin-bottom:1.25rem}.form-label{display:block;font-size:.875rem;font-weight:600;margin-bottom:.5rem;color:var(--text-main)}.input-wrapper{position:relative;display:flex;align-items:center}.form-input{width:100%;height:52px;padding:0 1rem;font-size:1.05rem;font-family:inherit;font-weight:600;letter-spacing:.5px;color:var(--text-main);background-color:var(--bg-main);border:2px solid var(--border-color);border-radius:var(--radius-md);outline:none;transition:var(--transition)}.form-input:focus{border-color:var(--border-focus);background-color:var(--bg-surface);box-shadow:0 0 0 4px var(--primary-light)}.input-hint{font-size:.8rem;color:var(--text-muted);margin-top:.4rem;display:flex;justify-content:space-between}.btn-primary{width:100%;height:52px;background:linear-gradient(135deg,var(--primary),#047857);color:#fff;font-size:1.05rem;font-weight:700;border:none;border-radius:var(--radius-md);cursor:pointer;display:flex;align-items:center;justify-content:center;gap:.5rem;box-shadow:0 4px 14px var(--primary-glow);transition:var(--transition)}.btn-primary:hover{background:linear-gradient(135deg,#047857,#065f46);transform:translateY(-2px);box-shadow:0 6px 20px var(--primary-glow)}.btn-primary:active{transform:translateY(0)}.sample-actions{margin-top:1rem;padding-top:1rem;border-top:1px dashed var(--border-color);display:flex;align-items:center;justify-content:space-between;font-size:.825rem}.sample-link{color:var(--primary);cursor:pointer;font-weight:600}.history-box{margin-top:1.25rem}.history-title{font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--text-light);margin-bottom:.5rem}.history-tags{display:flex;flex-wrap:wrap;gap:.5rem}.history-tag{background:var(--bg-main);border:1px solid var(--border-color);color:var(--text-muted);padding:.3rem .65rem;border-radius:var(--radius-sm);font-size:.8rem;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:.35rem;transition:var(--transition)}.history-tag:hover{border-color:var(--primary);color:var(--primary)}.section{padding:4rem 0}.section-alt{background-color:var(--bg-surface);border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color)}.section-header{text-align:center;max-width:750px;margin:0 auto 3rem}.section-title{font-size:2rem;font-weight:800;color:var(--text-main);margin-bottom:.75rem;letter-spacing:-.01em}.section-subtitle{font-size:1.05rem;color:var(--text-muted)}.section-tag{display:inline-block;padding:.35rem .85rem;background-color:var(--primary-light);color:var(--primary);font-size:.85rem;font-weight:700;border-radius:var(--radius-full);margin-bottom:.75rem;text-transform:uppercase;letter-spacing:.5px}.grid-3{display:grid;grid-template-columns:1fr;grid-gap:1.75rem;gap:1.75rem}@media (min-width:768px){.grid-3{grid-template-columns:repeat(2,1fr)}}@media (min-width:992px){.grid-3{grid-template-columns:repeat(3,1fr)}}.feature-card{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:1.75rem;transition:var(--transition);display:flex;flex-direction:column}.feature-card:hover{transform:translateY(-4px);box-shadow:var(--card-shadow-hover);border-color:var(--primary-light)}.feature-icon{width:52px;height:52px;background:var(--primary-light);color:var(--primary);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:1.25rem}.feature-title{font-size:1.25rem;font-weight:700;margin-bottom:.5rem;color:var(--text-main)}.feature-desc{font-size:.95rem;color:var(--text-muted);margin-bottom:1.25rem;flex-grow:1}.feature-link{font-weight:600;font-size:.9rem;display:inline-flex;align-items:center;gap:.35rem}.calc-widget{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:2rem;box-shadow:var(--card-shadow)}.calc-grid{display:grid;grid-template-columns:1fr;grid-gap:2rem;gap:2rem}@media (min-width:768px){.calc-grid{grid-template-columns:1fr 1fr}}.calc-results{background:var(--bg-main);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:1.5rem}.calc-result-row{display:flex;justify-content:space-between;padding:.6rem 0;border-bottom:1px solid var(--border-color);font-size:.95rem}.calc-result-row.total{border-bottom:none;font-weight:800;font-size:1.25rem;color:var(--primary);padding-top:1rem}.peak-widget{background:linear-gradient(135deg,var(--bg-surface-elevated),var(--bg-surface));border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:2rem;text-align:center;position:relative}.peak-status-badge{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1.25rem;border-radius:var(--radius-full);font-weight:800;font-size:1rem;margin-bottom:1rem}.peak-status-badge.off-peak{background-color:var(--badge-green-bg);color:var(--badge-green-text)}.peak-status-badge.peak{background-color:var(--badge-gold-bg);color:var(--badge-gold-text)}.pulse-dot{width:10px;height:10px;border-radius:50%;background-color:currentColor;animation:pulse 1.5s infinite}@keyframes pulse{0%{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(1.3)}to{opacity:1;transform:scale(1)}}.clock-display{font-size:2.2rem;font-weight:900;letter-spacing:1px;margin:.5rem 0;color:var(--text-main)}.table-responsive{width:100%;overflow-x:auto;margin:1.5rem 0;border-radius:var(--radius-md);border:1px solid var(--border-color);background:var(--bg-surface)}.data-table{width:100%;border-collapse:collapse;text-align:left;font-size:.95rem}.data-table th{background:var(--bg-main);color:var(--text-main);font-weight:700;padding:.85rem 1.15rem;border-bottom:2px solid var(--border-color)}.data-table td{padding:.85rem 1.15rem;border-bottom:1px solid var(--border-color);color:var(--text-muted)}.data-table tbody tr:last-child td{border-bottom:none}.data-table tbody tr:nth-child(2n){background-color:var(--bg-main)}.faq-list{max-width:850px;margin:0 auto;display:flex;flex-direction:column;gap:1rem}.faq-item{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-md);overflow:hidden;transition:var(--transition)}.faq-question{width:100%;padding:1.25rem 1.5rem;background:none;border:none;text-align:left;font-size:1.05rem;font-weight:700;color:var(--text-main);cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:1rem}.faq-icon{font-size:1.2rem;transition:transform .3s ease;color:var(--primary)}.faq-item.active .faq-icon{transform:rotate(180deg)}.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease;padding:0 1.5rem;color:var(--text-muted);font-size:.975rem;line-height:1.65}.faq-item.active .faq-answer{max-height:500px;padding:0 1.5rem 1.25rem}.content-wrapper{max-width:880px;margin:0 auto;background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:2.5rem;box-shadow:var(--card-shadow)}.content-body h2{font-size:1.65rem;font-weight:800;color:var(--text-main);margin:2rem 0 1rem;letter-spacing:-.01em}.content-body h3{font-size:1.3rem;font-weight:700;color:var(--text-main);margin:1.5rem 0 .75rem}.content-body p{font-size:1.025rem;color:var(--text-muted);margin-bottom:1.25rem}.content-body ol,.content-body ul{list-style:initial;padding-left:1.5rem;margin-bottom:1.5rem;color:var(--text-muted)}.content-body li{margin-bottom:.5rem}.info-alert{background:var(--primary-light);border-left:4px solid var(--primary);padding:1.25rem 1.5rem;border-radius:0 var(--radius-md) var(--radius-md) 0;margin:1.5rem 0;color:var(--text-main)}.info-alert h4{font-size:1.05rem;font-weight:700;color:var(--primary);margin-bottom:.25rem}.city-pill-grid{display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center;margin-top:1.5rem}.city-pill{background:var(--bg-surface);border:1px solid var(--border-color);color:var(--text-main);padding:.6rem 1.25rem;border-radius:var(--radius-full);font-weight:600;font-size:.9rem;display:inline-flex;align-items:center;gap:.5rem;transition:var(--transition);text-decoration:none!important}.city-pill:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);box-shadow:0 4px 12px var(--primary-light)}.site-footer{margin-top:auto;background-color:var(--bg-surface);border-top:1px solid var(--border-color);padding:3.5rem 0 1.5rem}.footer-grid{display:grid;grid-template-columns:1fr;grid-gap:2.5rem;gap:2.5rem;margin-bottom:3rem}@media (min-width:768px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}}.footer-col-desc{color:var(--text-muted);font-size:.925rem;margin-top:.75rem}.footer-title{font-size:1.05rem;font-weight:700;color:var(--text-main);margin-bottom:1.25rem}.footer-links{display:flex;flex-direction:column;gap:.65rem}.footer-links a{color:var(--text-muted);font-size:.925rem;text-decoration:none}.footer-links a:hover{color:var(--primary)}.disclaimer-banner{background:var(--bg-main);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:1.25rem 1.5rem;font-size:.85rem;color:var(--text-muted);margin-bottom:2rem;line-height:1.55}.footer-bottom{border-top:1px solid var(--border-color);padding-top:1.5rem;display:flex;flex-direction:column;align-items:center;justify-content:space-between;gap:1rem;font-size:.875rem;color:var(--text-muted)}@media (min-width:768px){.footer-bottom{flex-direction:row}}@media (max-width:991px){.mobile-toggle-btn{display:block}.main-nav{position:fixed;top:72px;left:0;width:100%;background:var(--bg-surface);border-bottom:1px solid var(--border-color);padding:1.5rem;flex-direction:column;align-items:flex-start;gap:1rem;transform:translateY(-150%);opacity:0;visibility:hidden;transition:var(--transition);box-shadow:0 10px 25px rgba(0,0,0,.1)}.main-nav.active{transform:translateY(0);opacity:1;visibility:visible}.nav-list{flex-direction:column;align-items:flex-start;width:100%;gap:.75rem}.nav-link{width:100%;padding:.6rem 0}}